Решите уравнения 1 а (3 х+5) + (8 х+1) = 17 б 19-5 (3 х-1) = 9 2 а 30+5 (3 х-1) - 35 х-25 б 10 х-5=6 (8 х+3) - 5 х 3 а 6 (8 х+5) = 0 б 6 (8 х+5) = - 6 (3-5,8 х) - (2,2 х+3) = 16 21=-20-8 (2 х-0,5) - 10 (3-4 х) + 51=7 (5 х+3) 6 х-5 (3 х+2) = 5 (х-1) - 8 - 8 (2 х-0,5) = 0 - 8 (2 х-0,5) = -8

1. а) (3 х+5) + (8 х+1) = 17;

3 x + 5 + 8 * x + 1 = 17;

11 * x + 6 = 17;

11 * x = 17 - 6;

11 * x = 11;

x = 1;

б) 19-5 (3 х-1) = 9;

19 - 15 * x + 5 = 9;

- 15 * x = 9 - 19 - 5;

- 15 * x = - 15;

x = 1;

2. а) 30+5 (3 х-1) - 35 х-25 = 0;

30 + 15 * x - 5 - 35 * x - 25 = 0;

- 20 * x + 0 = 0;

x = 0;

б) 10 х-5=6 (8 х+3) - 5 х;

10 x - 5 = 48 x + 18 - 5 x;

10 * x - 5 = 43 x + 18;

10 * x - 43 * x = 18 + 5;

- 33 * x = 23;

x = - 23 / 33;

3. а) 6 (8 х+5) = 0;

48 * x + 30 = 0;

x = - 30 / 48;

x = - 10 / 16;

x = - 5 / 8;

б) 6 (8 х+5) = - 6;

8 * x + 5 = - 1;

8 * x = - 6;

x = - 6 / 8;

x = - 3 / 4;

c) (3-5,8 х) - (2,2 х+3) = 16;

3 - 5. 8 x - 2. 2 x - 3 = 16;

- 5. 8 x - 2. 2 x = 16;

- 8 * x = 16;

x = - 2;

d) 21=-20-8 (2 х-0,5);

21 = - 20 - 16 x + 4;

21 = - 16 - 16 * x;

16 * x = - 16 - 21;

16 * x = - 37;

x = 37 / 16;

e) - 10 (3-4 х) + 51=7 (5 х+3);

- 30 + 40 x + 51 = 35 x + 21;

21 + 40 * x = 35 * x + 21;

5 * x = 0;

x = 0;

f) 6 х-5 (3 х+2) = 5 (х-1) - 8;

6 * x - 15 x - 10 = 5 x - 5 - 8;

- 9 x - 10 = 5 * x - 13;

- 14 x = - 3;

x = 3 / 14;

g) - 8 (2 х-0,5) = 0;

- 16 x + 4 = 0;

- 16 x = - 4;

x = 4 / 16;

x = 1 / 4;

x = 0. 25;

k) - 8 (2 х-0,5) = -8;

2 * x - 0. 5 = 1;

2 * x = 3 / 2;

4 * x = 3;

x = 3 / 4.